I use TPLink power line plugs to link my AV stuff in the lounge to the router, NAS etc in the study. There's a TPLink router at either end. I'm having this weird problem where the network in the lounge randomly disconnects. To fix it it I just unplug the cable from the router to the power line plug and pop it back in again. Everything then starts working again. Can anyone shed any light on why this is happening and what I can do to fix it?